#include "../common/etcd.hpp"
#include <gflags/gflags.h>
#include <thread>
#include <brpc/server.h>
#include <butil/logging.h>
#include "main.pb.h"

DEFINE_bool(run_mode, false, "程序的运行模式, false-调试; true-发布;");
DEFINE_string(log_file, "", "发布模式下，用于指定日志的输出文件");
DEFINE_int32(log_level, 0, "发布模式下，用于指定日志的输出等级");

DEFINE_string(etcd_host, "http://127.0.0.1:2379", "服务注册中心地址");
DEFINE_string(base_service, "/service", "服务监控根目录");
DEFINE_string(instance_name, "/echo/instance", "当前实例名称");
DEFINE_string(access_host, "127.0.0.1:8080", "当前实例外部访问地址");
DEFINE_int32(listen_port, 8080, "Rpc服务器监听端口");

class EchoServiceImpl : public example::EchoService
{
public:
    EchoServiceImpl() {}
    ~EchoServiceImpl() {}

    virtual void Echo(google::protobuf::RpcController *controller, const ::example::EchoRequest *request,
                      example::EchoResponse *response, google::protobuf::Closure *done) override
    {
        brpc::ClosureGuard rpc_guard(done);
        std::cout << "收到消息:" << request->message() << std::endl;

        std::string str = request->message() + "--这是响应!!";
        response->set_message(str);

        // rpc_guard 自动调用 run 接口  done->Run();
    }
};

int main(int argc, char *argv[])
{
    google::ParseCommandLineFlags(&argc, &argv, true);
    init_logger(FLAGS_run_mode, FLAGS_log_file, FLAGS_log_level);

    // 关闭 brpc 的默认日志输出
    logging::LoggingSettings settings;
    settings.logging_dest = logging::LoggingDestination::LOG_TO_NONE;
    logging::InitLogging(settings);

    // 2. 构造服务器对象
    brpc::Server server;

    // 3. 向服务器对象中，新增 EchoService 服务的子类
    EchoServiceImpl echo_service;
    int ret = server.AddService(&echo_service, brpc::ServiceOwnership::SERVER_DOESNT_OWN_SERVICE);    // 失败不销毁 
    if (ret == -1) {
        std::cout << "添加 rpc 服务失败! \n";
        return -1;
    }

    // 4. 启动服务器 
    brpc::ServerOptions options;
    options.idle_timeout_sec = -1;      // 连接超时销毁
    options.num_threads = 4;            // io线程数
    ret = server.Start(FLAGS_listen_port, &options);
    if (ret == -1) {
        std::cout << "启动服务器失败! \n";
        return -1;
    }

    // 4. 注册服务
    Registry::ptr rclient = std::make_shared<Registry>(FLAGS_etcd_host);
    rclient->registry(FLAGS_base_service + FLAGS_instance_name, FLAGS_access_host);

    server.RunUntilAskedToQuit();

    return 0;
}